Storage-battery plate



B. FOR-D.

STORAGE VBATTERY PLATE. APPLICATION FILED mma. 1920.

1,376,929. Patented May 3, 19271.

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l UNITED STATES BRUCE FORD, OF PHILADELPHIA, PENNSYLVANIA.. l'

creased ener PATENT oEricE.

Specification of Letters Patent.

PatenteaMay 3,1921.

" Application Vilecl January'23, 1920, Serial No. 353,484.

T'o all whom 'it may concern Be it known that I, BRUCE Fono, 'a citizen of the United States, residin at Philadelphia, in the county of Phi adelphia and :State of Pennsylvania,

tain new and useful improvements in Storage-Batter Plates, of which .the following is a spec cation.

- The principal objects of the present'inven- Fundamentally the invention is based upon the embedding in the active material which this metal surface.

of a lar e portion of the grid metal comprising t e outside or marginal frame of the plate. "The extreme marginal outside portion of the frame of a plate is almost necessarily of the full thickness of the plate, but as contemplated by this invention a large portion of the marginal frame is made thinner than the thickness of the plate and is ar-` ranged vsubstantially on the center line between the plate faces; it will thus be apparent 4that for a given ,quantity of metal em loyed for thefoutside frame of the grid, a p ateof a given overall lengthv and width will have a greater surface of active material than if the entire metal of the outside frame were of the full thickness ofthe plate, be.

cause that portion of the outside frame which is made thinner than the plate is covered by active material. This covering o f active material tends,particularly in a' positive pole plate, to protect the metal so covered against corrosion and disintegration to is subject when exposed to .the direct electrolytic action at the plate In the following description reference will be made to the' accompanying drawings forming part hereof and in,which-` Figure 1, is an elevational view with parts broken away of a plate embodying features of `the invention.

Fig. 2, is a section drawn'to an enlarged nscaliiiand taken on the'lline 2, of Fig. 1.

have invented cerincreased life, and to increase' for a detogether 3, of ig. 1, and f -v Figs. 4, 5, 6, and 7, are views .similar to Fig. 2, and illustrating modifications.

ln thedrawings 1, is the outside -or marginalrectangular frame of a grid and it has a marginal portion or bead a., of substantially A' Fig;` 3, is a similar view taken onA thev line A i the thickness of the plate, and a web section I), of less thickness than the bead and eX- tending inward which in the finished plate is buried in the active material, or material i to become active 9, which extendsato the marginal portion or bead a.

ln Figs. 4 to 7,-thefweb is shown as per-- forated at '10, and'when this is done, additional keyingl is provided for the active inal terial. 4

ln cross section a frame embodying features of the invention may assume various forms, Afor example, Fig. 4, shows it of deckof otlier'forms.4 However, the -deck-beam form .1s possessed vof special advantages.

This rectangular frameV isshown as probeam form, and Figs. 5,v 6 and 7, show some vided at its topp-with a lug 4, havinga tapering extension 5, along the top ofthe frame. 'Ihis tapering extension, when resent, provides horizontal conductivity Without'sacrifice ofactive surface. `The frame 1, contains a grillage and is provided with cavities 6a, arranged-around the frame, and with cavities 6, which when filled with active material provide for the latter an uninterrupted surface entirely across the frame and web sectionsof the sides thereof. The grillage, as shown, consists of vertical rods 7 i disposed in and substantially connedto the plane of the web'section b, of the frame, or

in other Words, to the'median plane of the frame, and the grillage sectionto the bead section a., of the frame,

' and these lbars 8, extend to the opposite faces as a thin coat over the outer surfaces of the tie-bars 8,'01 stop flush with'those surfaces.

also consists of horizontal tie-bars 8, extending across the web l In any event the web portions b of the frame 1,7 are buried in the active .material and only a smallportion of the marginal bead` 'portion a, may come. to the surface of the active material or material to become active.

From the foregoing description it will be evident to those skilled in the art that in proportion to the total plate area the active surface is largesince, by covering the-web -iio portion I), it extends .practically to the outer marginal edge or bead a, of the frame 1, but Without sacrifice of strength of theI frame. The vertical rods 7, being buried in the active material do not diminish theactivey surface, and they may be suiciently numerous to facilitate electric conductivity to the top of the plate by providing an ample path in the direction in which the current tends to flow.

11, is a retainer .vvhichis shown as consisting of a slotted rubber sheet, because `such a retainer and separator gives good results With the described plate, but the invention is not limited to the use of such a separator or retainer or to the details of construction or arrangement shown and described or in any Way other than the prior art and the appended claims may require.` F or example, the-described frame With marginal bead and inward Web possesses advantages of its own which can be availed of Without the Special grillage described, which is made thesubject-matter of my application, Serial No. 353,485, but vthe described frame and described grillage possess advantage in combination and are so claimed in that application.

I claim:

l1. A stora e battery plate having a grid consistingo a grillage surrounded by a Web 3. A grid for storage battery plate consisting/of a. grillage surrounded byl a rec-- tangular marginal frame of Web section the portion of Which'is provided with perforations, substantially as described. ,j

4. A storage battery plate having a frame provided with a marginal portion or bead of substantially the thickness of the plate and with a Web section of less thickness than the bead and buried in the active material,

or material t6 become active, which' extends to the bead, substantially as described.

5. A storage battery plate having a frame. provided with a marginal portion or bead of substantially the thickness of the plate and with a perforated web section of. less thickness than the bead and buried in the active material, or material to become active, which extends through the perforations and tothe bead, substantially as described.

BRUCE FORD. 

